Process for stapling continuous artificial fiber



R. KERN July 15, 1941.

PROCESS FOR STAPLING CONTINUOUS ARTIFICIAL FIBE Filed June 428, 1939 3 Sheets-Sheet 2 July 15, 1941. R KERN 2,249,083

PROCESS FOR STAPLING CONTINUOUS ARTIFICIAL` FIBER I Filed June 28, 1939 3 Sheets-Sheet 5 Patented July 15, 1941 raocass ron s'rArLlNG coN'riNUoUs earwrcmr. rmaa Rudolf Kem, Gladbaeh-Rheyst, Germany Application .lune Z8, 1939, Serial No. 281,709 In Germany December 30, 1937 2 claims. A (Cirio-1) n the manufacture of cellulose wool, continuous artificial ber bands having the yindividual bers thereof running parallel to -each other are normally cut into staples and then forwarded to the mechanical spinners in a mixed condition as raw material, that is, cellulose wool. The mechanical dressing and preparation, for instance, in the drawing apparatus and combing by the cotton spinners, required for forming a capable spinning band with more or less parallel ber layers, not only represents a lengthy and expensive procedure, which for many purposes could be entirely dispensed with, but also considerably spoils the uniformity of length,stretch ing capacity and original breaking power of the bers. I

Various methods and devices have\ heretofore been developed for the direct stapling and immediate continuation of spinning of continuous artificial ber bands, by which, for instance, the ber cable, which has gradually been torn through exceptional pressure between the pairs of drawing cylinders and the ber pieces, are thereby gathered for further spinning. But, this manner of work improperly forms the length ofthe ber staples obtained within the distances between the pressure points of two pairs of drawing cylinders, as a result of which the staples immediately fall from their bands, whereupon, the spinning material thus obtained only partially fulfils the purposes of the cellulose wool spinning mill, and does not at all meet the demands of the cotton drawing frame spinning mill.

The process of the present application elimii nates berspoiling mechanical preparation pro# ceedings. Thus, for instance, every carding, combing and unnecessary drawing of the bands or ribbons is excluded. lIt therefore does away with every superfluousl demandfon the bers and everyv shortening and weakening thereof. It avoids, furthermore, a sideward expanding of the slubbing when staplingand by that, prevents the passing through the machine of unstapled ber masses. their union, for instance, the slubbing band, have the bers hung together almost in their entire length and they lie with their ber points inside the slubbing and their ends are directed towards the bulk.

The principal object of the present invention is to provide a process and apparatus there-for which will permit the stapling of artificial bers without the loss of bers or injury to the natural characteristics thereof and to collect said staple bers in such a manner that the. same, with very slight deviations at their end, will be held together for nearly their entire` length. y

Further objects of the invention will be, in'

part obvious and in part Apointed out inthe following description o f the accompanying 'draw- According to another process, articial ber bands with periodically deviating transfer sections of'the individual bers are produced, so that these, in the following step in the drawing frame, tear at weakened points. In the cases mentioned, the bers are pulled and loaded far beyondtheir elastic stretching limit, whereby they lose a considerable portion of their tearing power and other properties important to the bearing of the textures.

Trials have been made cutting endless ber l bands instaples of desired length by means ofu short knives arranged on rollers and then drawing out immediatelythereafter these shavinglike joined band or ribbon cuttings. As a result thereof, the bers which have been passed out sidewards by the prearranged small knives can b e present'in the 'ber band either 'unstapled or stapled in an indefinite length, whereby their draft is inuenced especially in th'ecotton drawing frame spinning mill, which is entirely dependent on the ber length. v

In the drawings: Fig. 1 is a schematic view of one manner of cutting a ber band.

Fig. 2 is a schematic view of a modied form of cut for ber bands.

' Fig. 3 is a schematic view` of a second modification of a cutting of fiber bands.

Fig. 4 is a. detail side view of a continuous cutting device. Fig. 5 isa front view of Fig. 4. 'l Fig. 641s a front view of a modified form of cutting device. v

- Fig. 7 is al side plan view `of a device for' stapling and collecting bers, and e i Fig. 8 is a side view of a. machine for stapling to its running direction at a sharp angle so that the section b' (Figs. 1 and 2) forms a ribbon of adhering bers which are relatively long and are thereby simultaneously caught,'i. e., held together by several successive drawingcylinders The fiber masses themselves in 1,11 and m (Figs. 1 and 2i or .the pressure unes k. As these part sections strips, sections b. in rows and side by side follow one after the other, however, the single cuts do not, as is the case with 'I'he invention is more closely describedherewith on the strength of a schematic example of its execution.

Upon rolling a sharp edged worm, such as a spiral knife or .the 4like s under pressure on a sub-cylinder u (Figs. 4-6) and inserting a ribbon of continuous artici'al ber, which eventually expands between this pair of cylinders, the moving worm or spiral knife points slowly cut the ber band at the given pressure points, thus at an angle. The number and pitch of the threads of the spiralV knife or the like detained, as the following threads can separate one and the same ber at previously fixed intervals a second time, a third time, etc. The progress of the cut of the total width is shown schematically in Figs. 1 and 2.

For instance, an applied three course spiral knife s of 48 mm. diameter and 18 mm. thread rolling on sub-cylinder u would yield an approxwide ber Iband would, with ev n knife point, cut through all together, about 300 mlm. COIIISBC" appears especially favorable to insert a ber band, 'according to the example shown in Fig. 6, with the halves thereof each under a right and left coursed cutting spindle, whereby not only eventual side pressures of theA cutting spindle against the ber band is .done away with, but also, according vto Fig. 3, all of the entering points c of the individual sections are arranged inside the ribbon breath, while in each case the points d (Fig. 3) subjected to the draft, lie at the outer edges of the ribbn. 'I o avoid band breakages in the drawing frame, respectively between each two pairs of drawing cylinders, this arrangement appears especially suitable.

The gripping of the ber by the latter arrangement is shown in Flg..3 and discloses the especially favorable drafting condition thereof.

According to this process, but before inserting the draft, the bers which are still held fast by the drawing cylinder pairs after stapling. form at rhombs which are slipped one into the other like -ngers and on the points of which the draft sets in in'echelonsin every uniform rotation. This unusual symmetrical arrangetermines the staple length which can be obimate staple length of 15 mm., while a 36 mm.

utive lengths of ber, according o Fig. 1. It v ment appears especially adapted for the production' of even and smooth yarns.

InFig. 7 is schematically shown an example according. t the present process for an unwinding, stapling and drawing arrangement. From coil 2 carrying the continuous articial ber band a, the band goes over a delivery and spanning device 4-8 into the staple arrangement 9. 8 and after thatl into the drawing frame I3, I3', Il, I4',-I5, I5', after which it is urther spun in the known manner. This arrangement may be changed as desired and the staple arrangement can be operated as an independent aggregate under separation of the following drawing frame.

'Ihe device can alsobe arranged directly on the drawing arrangements of yers. It can also be put or worked in commotion with them as a separate independent aggregate in .front of such machines. \Such an arrangement is those bobblns which contain the continuous ar-y ticial ber ribbon. The cables 3 run from here into the pair `of feed rollers 4 and from there over table 5 which is shaped tray-like at its front end 6 towards the cutting roller pair. The tray `6 works together with an upper roller "I, which can be suitably loaded. From the pres-` sure between tray 6 and upper roller 1, the ber material canI be drawn over cutting cylinder 8 on which the' ,cutting or knife roller 9 rests. The cutting or knife roller 9 is adjustable elastically by spring I0 and hand wheel II. 'Ihe ber material which is passed through these pairs of rollers, 9 is cut diagonally, according to Figs. .1-3. It goes to the drawing frame either directly or, in this case, over a-table I2 which consists of roller vpairs I3, I4, I5. Onleaving the pairs of rollers, the distorted parallel ber bun- 40 dles I6 are twisted by spindles I1;

Manifestly, the construction." herein shown is capable of considerable ymodification and such modifications as come within the scope of my claims, -I consider within the spirit of my invention..

1. Process forvthe stapling and drafting of continuous artificial ber-bands consisting in cutting said bands in a continuous manner into 50/ribbons which -latter extend diagonally-from the outer edge of the band and meet in the medial portion of the band considerably rearward of the edge cut and pressing the ber ends towards one i another. y

2. Process 'for the stapling and drafting of continuous articial ber-bands consisting in cutting said bands in ribbons which latter extend diagonally |from the edges of the` band towards the middle thereof and 'pressing the bers 60 towards one another.

RUDOLF KERN.

shown in Fig. 8. In the creel I are inserted l 

